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Tim explores a shocking claim that life expectancy in some parts of Glasgow is less than it is in Rwanda. But is that fair on Glasgow and for that matter is it fair on Rwanda? And a listener asks whether loss of smell is a strong enough symptom of Covid that it might be used to help diagnose the virus, replacing rapid testing.

Presenter: Tim Harford
Producer: Chloe Hadjimatheou

(Left: Rwanda refugee - photo Reza. Right: Glasgow homeless man - photo Christopher Furlong / both Getty images)